We report on the fabrication, characterization and integration of semiconductor microtube lasers on silicon. These
microtubes are fabricating using standard photolithography techniques on epitaxially grown strained bilayer films, and
show remarkable spectral properties attributable to whispering-gallery-mode type optical resonances. We have
demonstrated coherent emission coupled to the optical microcavity modes in both GaAs/InGaAs and InGaAsP
microtubes with embedded quantum dots. Furthermore, the GaAs/InGaAs microtubes have shown room temperature,
continuous wave lasing. The microtubes can be transferred to any foreign substrate without affecting their optical
properties. Work is in progress to couple the tubes with integrated silicon-on-insulator waveguides.
A new compact standard single mode fiber Michelson interferometer deflection sensor was proposed, tested and
simulated. The new interferometer consists of a symmetrical abrupt 3 dB taper region with a 40 μm waist diameter, a
700 μm length and a 500nm thick gold layer coating. Compared with similar interferometric devices based on long
period gratings that need microfabrication technology and photosensitive fibers, the proposed sensor uses a much
simplified fabrication process and normal single mode fiber, and has a linear response of 1.1nm/mm.